Handheld detector device



FIG. 1 is a front-left-bottom perspective view of a handheld detector device embodying the new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a rear-right-top perspective view thereof.

The broken lines depict portions of the handheld detector device in which the design is embodied that form no part of the claimed design. Additionally, the dash-dot lines denote the boundary of the claim and form no part of the claimed design. 

CLAIM The ornamental design for a handheld detector device, as shown and described. 